Undercutter-guide.



I. 0. DRAKE.

UNDERCUTTER GUIDE.

APPLICATION FILED JAN. 7. 1916.-

1 69,498, Patented-June 11, 1918.

2 SHEETSSHEET I.

I. C. DRAKE.

UNDERCUTTER GUIDE.

APPLICATION FILED JAN. 7. ms.

Patented J une- 11, 1918.

2 SHEETSSHEE1"2.L

TTE

IRA C. DRAKE, OF ROCHESTER, WASHINGTON.

UNDERCUTTER-GUIDE.

Specification of Letters Patent.

Patented June 11, 1918.

Application filed January 7, 1916. Serial No. 70,814.

To all whom it may concern Be it known that I, Tim C. DRAKE, a citizenof the United States, residing at Rochester, in the county of-Thurstonand State of lVashington, have invented certain new and usefulImprovements in Undercutter- Guides; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

The invention relates to improvements in undercutter guides for crosscutsaws.

The object of the present invention is to improve the construction ofundercutter guides for crosscut saws and to provide a simple, practicaland inexpensive undercut guide equipped with an edged tool adapted toperform the double function of supporting the guide on a log and ofenabling slabs to be cut off to release a saw when the same isnecessary.

A further object of the invention is to provide an undercutter guideof'this character having a chisel capable of general use where arelatively large tool of this kind is desired.

Another object of the invention is to provide an undercutter guidecapable of ready adjustment for arranging the guiding wheel in theproper position and adapted to securely lock the supporting means in itsadjustment.

Vith these and other objects in view the invention consists inthe-construction and novel combination and arrangement of partshereinafter fully described, illustrated in the accompanying drawingsand pointed out in the claim hereto appended, it being understood thatvarious changes in the form, proportion and minor details ofconstruction may be resorted to without departing from the spirit orsacrificing any of the advantages of the invention.

In the drawings Figure l is a side elevation of an undercutter guideconstructed in accordance with this invention,

Fig. 2 is a plan view of the same,

Fig. 3 is a side elevation showing the opposite side from thatillustrated in Fig. 1,

Fig. 4 is a transverse sectional view taken substantially on line 4-4 ofFig. 3,

Fig. 5 is a detail view of the bolt, the toothed wheel and thesupporting arm.

Like numerals of reference designate corresponding parts in the severalfigures of the drawings.

In the accompanying drawings in which is illustrated the preferredembodiment of the invention, the undercutter guide comprises in itsconstruction, a chisel 1 consist ing of a blade 2, a handle 3 and a flatintermediate portion 4 arranged in a plane at right angles to the planeof the chisel blade 2 and provided at one side with an annular boss 5having a central opening 6 for the re-- ception of a transverse bolt 7.The opening 6 is tapered as shown and the bolt which has a cylindricalhead is provided with a tapered or conical intermediate portion 8 whichfits the tapered opening. The bolt is alsoprovided with a threadedportion 9 receiving a tail nut 10 which is located atthe face of theintermediate portion 4 op posite that at which the boss is arranged.

A washer 11 is interposed between the tail nut 10 and the side of theintermediate portion 4 and the rounded or cylindrical head of the boltis provided with a trans verse opening 12 for the reception of asupporting arm 13 which also engages a groove 14 of a toothed wheel 15whereby the latter is interlocked with the bolt. The toothed wheel 15which has-an opening 16 to receive the head of the bolt is interposed between the supporting arm 13 and the boss or enlargement of theintermediate portion 4 of the chisel and it is provided with peripheralteeth 17 and intervening recesses 18 conforming to the configuration ofa stud 19 projecting from the adjacent face of the intermediate portion4 of the chisel. The bolt is adapted to be loosened to enable thetoothed wheel to be disengaged and rotated to arrange the supporting armin the desired position, and when the desired adjustment is elfected thebolt is to maintain the toothed wheel tightly in engagement with thechisel and the stud thereof.

The supporting arm which preferably has a flat inner face 20 to fit thegroove is supported in the opening of the bolt by a key 21 or othersuitable fastening device and it is provided at its lower end with anoutwardly extending shaft 22 which carries a grooved wheel 23. Thegrooved wheel which is retained on the shaft 22 by a key 24 or othersuitable fastening means is adapted to receive the blade of an undercutsaw to enable the saw to cut beneath a log in the usual manner. Thesupporting arm and the shaft are constructed of resilient material andthe shaft is adapted to yield or spring as the arcs-scat saw is movedbackwardly and forwardly andrgives and takes to the Wood. The chisel isadapted to be readily driven into the log for snpporting the undercutterguide and it is adapted for cutting off slabs thatoften split down incutting the log ofl' from the top of thelatter. i

In practice, the log often splits down and a small slab will catch thesaw so that it has to be cut loose. The chisel of the undercutter isexceedingly convenient for this purpose and it may be employed for avariety of other purposes where a tool of this character is desired.

What is claimed is An underoutter guide including a chisel constitutinga supporting member and adapted to be driven into a log, said chiselconsisting of a blade, a handle and an intermediate portion having flatside faces arranged in aplane at right angles to the plane of the blade,said intermediate portion being provided with an integral lateraillyprojecting boss lia-ring an inwardly tapered opening, a bolt 1 assingthrough the opening and provided with an enlarged tapered portionfitting the same, ajoothed wheel mounted on the enlarged portion of theboltgand projecting beyond the boss, a supporting arm piercing theenlarged portion of the bolt :and interlocked with the toothed Wheel,and a pin projecting laterally from the Hat intermediate portion of thechisel and engaging the toothed Wheel at the periphery thereof to securethe Wheel and: the supporting arm in an adjusted position with relationto the chisel, and a guide 'wheel carried by the supporting arn' Intestimony whereof I affix my signa ture in presence OE two Witnesses.

IRA C. DRAKE.

lVitnesses:

Row. M. PATON, CLYDE PATON.

Copies of this patent may be obtained for-five cents each, by addressingthe Commissioner of Patents. Washington, .D. 0.

